Mechanical movement.



M. A. DROITCOUR. MECHANICAL MOVEMENT.

APPLICATION FILED JUNE 15, 1911.

1,077,81 5. Patented Nov. 4, 1913.

WIT M53555 LVVENY'OI? UNITED STATES PATENT OFFICE.

.MICHAEL ANHREW DBOITGO'UR,.OF- OAK BARK, ILLINOIS; ASSIGNOR T0 MIEHLEPRINTING-PRESS: AND LEANUFAGTIIBINQOOMPANY, 0E CHICAGO, ILLINOIS, A

GGRPORATION OF ILLINGIS.

MEGHANIGAL..MOVEMENT.

Specification of Lettersfatent.

PatentedNov. 4, 1913.

Original application filedil'ebmaryfil; 1911, Serial No; 6103543.Divided-and this application filed .Tune 15, 1911. Serial No. 633 431.

The present application is adivision ofian application for patent onsheet delivery mechanism filed by me February 24th 1911,.

Serial No. 610,543.

This invention is a novel mechanical movement whichwhile originallydesigned for use in operating delivery mechanism of sheet printingpresses, is also-adaptable to many other purposes in mechanical arts,particularly where it is desired to'irnpart irregular reciprocatorymovements to parts.

The object of'the present: invention is to enable one member of themovement to be rcciprocated forany desired length of stroke,

and if desired with difierent speeds on its strokes; and with dwellsbetween the strokes; and to be reversed at the ends of its strokes withan easy and practically. true crank motion.

The invention issuch that movements of this character may be efiected byvery simple means accurately and smoothly.

In the accompanying drawings I have shown one form of mechanicalmovement cmbodyin the invention, and-which in con nection with thefollowing description will enable any one to understand, construct andoperate same; but the invention,-as will appear when its modeofoperation and general construction is understood,iscapable ofembodiment in a variety of mechanical forms to produce a variety ofreciprocating movements or motions, and therefore I refer to the claimsfor summaries of the essential features and-combinations of parts of theis a similar view showing the parts in another position.

In said drawings 3 designates a shaft from which the sheet deliverycarriage of a printing press may be actuated; such sheet deliverymechanism forms no part of the present application and therefore is notdescribed herein; but is fully disclosed in my aforesaid application.This shaft 3 is oscillated, so as to move the delivery. carriage backand forth as explained in said application, by the novel mechanicalmovement forming the subject-matter of the present application. As shownthis shaft 3 has a pinion 3* on one end which is engaged by areciprocatory rack bar 3 which rack bar is attached to a crosshead oryoke 3 forming part of my mechanical movement which I will nowdescribe,first remarking that the bar 3 or cross-heador'yoke 3 may beguided by any suitable means. As shown the bar 3 is guided in a bracketf attached to the frame.

T720 mechanical movemcnt.In the example illustrated in the drawings themovement comprises a cross-head or yoke 8 having a longitudinal slot 3*.The slot 3 is engaged by a suitable device, such as a roller 7 on a pin7*, attached to an endless carrier 7, such as a chain, band, rope, orbelt, running over suitable supporting and driving pulleys or wheels.

I have for purposes of illustration shown the carrier as a sprocketchain and running over three sprocket-gears 7, T 7, which may bearranged as desired in one plane. The gears 7 7, are shown located insub stantially the same horizontal plane, and the gear 7 as locatedsubstantially vertically above the gear 7", so that there is ahorizontal run of the carrier 7 between the gears 7, 7; a vertical runof the carrier 7 between the gears 7", 7; and an inclined run of thecarrier between the gears 7 7. The yokecngaging device 7 on the carriertraverses a path conforming to the run of the carrier; and in passingfrom the gear 7 to the gear 7 on the vertical run of the carrier it willraise the yoke 3' and rack bar quickly and evenly, (assuming the carrierto he traveled at uniform speed,) and thereby impart a practicallyuniform rotary motion to the shaft 3. The yoke 3 (and shaft 3) is sloweddown and stopped and its motion reversed as and while pin 7 passes overthe gear 7; and then the yoke is lowered (and shaft 3 is rotatedreversely) at practically uniform but slower speed, while the pin 7 ispassing from gear 7 to gear 7; and the yoke (and shaft 3) is slowed downand stopped, as and while the pin'7 is passing around and under gear 7;and during the time that the pin is moving from gear 7 to gear 7 theyoke remains stationary (and no motion is imparted to the shaft 3) untilthe pin reaches the ascending side of gear 7. The carrier may hetraveled in various ways:

' For example, gear 7 may be keyed to a shaft on which is a pinion 8meshing with a pinion 8 on a shaft 8 carryinga bevel gear 8 meshing witha bevel gear 8 on a counter-shaft 8 which may be driven from anysuitable part of the machine to which the invention is applied. The yoke3 can thus be moved (and shaft Smay thus be re;

tated) in one direction more slowly than it is in the other, and may bestopped during the time that the pin 7 is traveling from gear 7 to gear7 and by varying the relative locations and distances apart of thesprocket-wheels or pulleys supporting the carrier, the pin can be madeto traverse any desired path, and thus give any desired irregular orvariable reciprocatory movements to the yoke 3 (and correspondingirregular rotary motions to shaft 3). The yoke 3 may be immediatelyconnected to the part to be moved to give corresponding irregularmotions thereto; or it may be mediately connected to the part to beoperated; one mediate connection between the yoke and an oscillatoryshaft 3 being indicated in the drawings.

It will be obvious from the foregoing that the invention is capable ofembodiment in various forms and that it is not restricted to thespecific arrangement indicated in the drawings, and I .10 not intend tolimit myself by mere terminolo of part-s such as yoke, pin, chain etc.,to the particular parts set forth; as such terms are intended to includeany substantial equivalents for the parts so designated.

WVhat I claim is:

1. In a mechanical movement for converting rotary into irregularreciprocatory forv causing the carrier to travel in an irregularmovement, an endless carrier, means path, a member movable in a planeparallel with that of the carrier, and means on the carrier engaging themember whereby the latter is reciprocated with different speeds on itsalternate strokes-when the carrier is traversing its path.

2. In a mechanical movement, an endless carrier, means for guiding thecarrierin an endless angular path, and a reciprocatory yokemovable in aplane parallel with the plane of the carrier, and a device on andmovable with the carrier and engaging said yoke whereby the latter isreciprocated with different speeds on its alternate strokes as thecarrier is traversing its path.

3. In a mechanical movement for converting rotary into irregularreciprocatory movement, an endless carrier, means for causing thecarrier to travel in an irregular path, a slotted yoke moving in a planeparallel with that of the carrier, and a device on the carrier engagingthe slot of the yoke whereby the latter is reciprocated and at timescaused to dwell when the carrier is traversed.

4:. In combination, an oscillatory shaft, a gear on said shaft, areciprocating rack bar engaging said gear, and a slotted yoke on saidrack bar; with an endless carrier beside said tar, means for guiding thecarrier in an angular path, and a device on said carrier engaging the.slot in the yoke to reciprocate the latter.

5. In combination, an oscillatoryshaft, a gear on said shaft, areciprocating rack bar engaging said gear, and a slotted yoke on saidrack bar; with an endless carrier beside said bar, a triangularlyarranged set of pulleys supporting said carrier, and a device on saidcarrier engagingthe slot in the yoke to reciprocate the latter.

6. In combination, a reciprocating. rack bar, a slotted yoke on saidrack bar, a triangularly disposed set of pulleys beside the bar, anendless carrier running over said pulleys, and a pin connected with saidcarrier engaging the slot in the yoke.

7. In combination, a shaft, a gear on said shaft; a reciprocating rackbar engaging said gear, a slotted yoke on said rack bar; an endlesscarrier beside said bar, triangularly disposed pulleys supporting saidcarrier, and a pin on said carrierengaging the slot in the yoke.

8. In combination, an oscillatory shaft, a gear on said shaft, areciprocating rack bar engaging said gear, a slotted head on said rackbar, a triangularly disposed set of sprocket gears, an endless sprocketchain rumiing over said gears, and a pin connected with said chainengaging the slot inthe head.

, In testimony that I claim the foregoing as my own, I afiix mysignature in presence of two witnesses.

MICHAEL ANDREW DROITGOUR,

Witnesses:

PERCY G. SHAW, G110. R. WHATLEY.

Copies of this patent may be obtained for in cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

